SU1377754A2 - Scale voltage indicator - Google Patents

Abstract

This invention relates to electrical measuring technology. The voltage indicator bar contains amplitude-time converters 1 and 7, triggers 2 and 6, setpoint adjuster 3 time intervals, AND-NOT elements 4, 5 and 11, which sets the LED 8, generator 9 pulses, element 10, resistors 12, 19 and 20, the indicator unit 13, consisting of cells (14.1) -

Description

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The invention relates to electrical measuring technology and can be applied in various measurement and control systems.

The purpose of the invention is to increase the information content by simultaneously displaying information about the magnitude and ratio of the two voltages.

The drawing shows a functional diagram of a voltage bar gauge.

The device contains an amplitude-time converter (WUA) 1, trigger 2, setpoint adjuster 3 time intervals (CIR), AND-HE elements 4 and 5, trigger 6, WUA 7, driving LED 8, pulse generator 9, And 10 element, And element - NOT 11, resistor 12, indicator unit 13, consisting of cells (14.1) - (14.N), each cell containing a photothyristor 15 and LEDs 16-18. In addition, the device contains resistors 19 and 20, a power supply unit 21 and first 22 and second 23 input buses.

The output of the pulse generator 9 is connected to the first input of the element AND 10 and through the ZVI to the 3rd control inputs of the amplitude-time converters 1 and 7, the S input of the trigger 2, the R input of the trigger 6, the first inputs of the elements. 4 and 5 and the cathode of the light-emitting diode 8, the anode of which through a resistor 12 is connected to the output of the power supply unit 21.

The inputs of the amplitude-time converters 1 and 7 are connected respectively to the input tires 22 and 23, the output of the WUA 7 is connected to the first input of the element 11, the second input of the latter is connected to the output of the WUA 1 and the second input of the element 10, the output of which is connected to the counting input of the trigger 2 , the direct and inverse outputs of which are connected respectively to the second inputs of elements 4 and 5, and the output of the NAND 11 element is connected to the S-input of the trigger 6, the inverse and direct outputs of which, respectively, through resistors 19 and 20 are connected to the anodes of the LEDs 17 and 18 cells (14. 1) - (14.N), the cathodes of the LEDs 17 and 18 in each cell 14 are connected to the anode of the LED 16, while the cathodes of the LEDs 16 through the photoresistors 15 are connected to the output of the element AND NOT 4 in odd0

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14 cells and to the output of the element AND-NOT 5 in even cells 14. The LED 8 and the photoresistor 15 of the first cell, as well as the LEDs 16 and the photo thyristors 15 of the remaining cells form optocouplers, and the LEDs 17 and 18 are indicator.

The voltage bar indicator works in the following way.

When the power supply unit 21 is turned on, the triggers 2 and 6 are set to an arbitrary state. The indicator unit 13 is reset, the triggering LED 8 does not emit light, since its cathode has a level log. 1 from the output of ZVI 3, the generator 9 of pulses functions, but its pulses do not arrive at the counting input of the trigger 2 through the element Z 10 closed by a zero potential from the output of the UPS 1. The inputs of the ZVI 3 receive pulses from the output of the generator. 9. At the output of the WUA 7 there is a log level. one.

When the input voltage is applied to the input buses 22 and 23, WUA 1 converts the amplitude of this voltage into a time interval, represented as a duration of the presence of a log. 1 at the output of the WUA 1 only for the arrival of the first negative, impulse log. 1 from the output of ZVI 3, which, I will affect:

-.on the first inputs of the elements AND-NOT 4 and 5 sets on their outputs

- log iV, null indicator unit 13;

- to the setup input of the trigger 6, sets a log on its direct output.

- to the setup input of trigger 2, sets a log on its direct output.

- on the cathode of the triggering LED 8, excites it and this optical signal prepares the photo thyristor 15 15 of the first cell 14.1 to be turned on;

-on the control inputs of the WUA 1 and 7, on the positive differential of this impulse, begin to function

WUA 1 and 7, With the output of WUA 1 level log. 1 opens the element AND 10, which starts to transmit pulses of the generator 9 to the counting input of trigger 2. This same differential turns off the de-energizing LED 8 and turns on the photoristor 15 of the first cell 14.1 and the LEDs 16 and 17 associated with it.

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The negative impulse ZVI 3 sets the triggers 2 and 6, zeroes the indicator block 13, excites the firing LED 8, starts the WUA 1 and 7, and excites the first 14.1 cell of the indicator block 15,

Since the voltage levels at the WUA 1 and 7 outputs are out of phase, then the output of the NAND 11 element will contain a log. 1, not. switching trigger 6.

In the case when the input voltage of the WUA 1 exceeds the reference voltage at the input of the WUA 7, i.e. WUA 1 time interval will be longer than WUA 7 time interval, at the common inputs of the AND-NOT 11 element, the log levels in the vehicle are in the log. 1, and the output - the log. Oh, the trigger 6 will switch to the opposite state.

The first pulse of the generator 9 through the element 10, open level log. 1 from the output of the HVAC 1, switches the trigger 2 to the zero state, which turns on the photoresistor 15 cells, 14.1 of the indicator unit 15, and the photo thyristor 15 cells 14.1 off because of the equalization of potentials on its electrodes.

Thus, the first pulse of the generator 9 leads to the excitation of the indication LED of the second cell 14.2 and damping in the first cell 14.1 of the block 13,

With the arrival of the second pulse on the counting input of trigger 2, a third cell 14.3 is excited in the same way, and the cell 14.2 of block 13 is quenched.

Such processes will occur in the indicator until the time interval from WUA 1 is over. If the input voltage of the indicator is less than the threshold voltage at the input of WUA 7, then a level log is present at the setup input to the trigger state 6. 1, the state of trigger 6 does not change; i.e. LEDs 17 are energized.

If before the arrival of the third pulse to the counting input of the trigger 2. at the output of WUA 1, the log will be displayed. Oh, then the third cell 14.3 will remain in the excited state, since element 10 is closed, generator 9 pulses do not pass to trigger 2, and it retains the previous state, i.e. at the end of the temporary inter

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shaft is memorizing information.

If, with the arrival of the third pulse of the generator 9, the time interval is not over, and the input voltage of the indicator is greater than the reference voltage, the output level of the AND-HE element 11 is log. O switches the trigger 6 to one at the direct output. This means that the LEDs 18 will display information, since a log is set up on their anodes. one.

Now the third pulse turns on the fourth cell 14.4 of block 13 and the LED 18 and turns off the third cell 14.3. The fourth pulse similarly turns on the fifth cell 14.5 and turns off the fourth 14.4.

If before the arrival of the fifth pulse of the generator 9, the time interval with WUA 1 ends, the cell 14.5 of the display unit 13 and its LED 18 will remain in the excited state, i.e. the previous state of the indicator will be memorized.

Thus, when the input signal exceeds a certain voltage, the LEDs switch from 17 to 18, which may have a different color of luminescence.

The occurrence of the next negative pulse at the output of the ZVI 3 will zero all the cells (14.1) - (14.N) of the indicator unit, set trigger 2 to one state, trigger 6 to zero, switch the first cell to the excited state 14.1 of block 13, it will start WUA 1 and 7, and with the arrival of pulses at the counting input of trigger 2, these processes are repeated.

- Frequency of starting WUA 1 and 7 is set by ZVI 3, which can be used as a frequency divider with a variable or a specified division factor, which generates a sequence of negative pulses from generator 9 pulses, the duration of which is equal to the maximum on-time of one of the AND-4 elements and 5 trigger 2 and LED 8 and should be sufficient to prepare the photo thyristor 15 cells 14.1 n turn off the elements of the cells 14 of the display unit 3, and the duration of the pause - the maximum time interval ae0

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this scale, plus the time for displaying storage information (if necessary),

Thus, on the light-emitting scale of the block 13 there will be an increasing light-emitting band, the length of which is proportional to the value of the input signal, and its color may depend on the value of the reference voltage.

Claims (1)

Invention Formula Voltage Scale Indicator by Aut. St. No. 1337787, characterized in that, in order to increase the information content by simultaneously displaying the magnitude and ratio of the two input voltages, an additional amplitude-time converter, the NAND element, the trigger, the resistor and N lights are introduced diodes, the cathodes of which in each cell are connected to the cathodes of the first LEDs of the corresponding cells, and the anodes of all additional LEDs are connected via an additional resistor to the direct output of the additional trigger, the inverse output of which is connected to the output of the first resistor, the first installation input of the additional trigger is connected to the inputs control of the main and additional amplitude-time converters, the outputs of which are connected respectively to the first and second inputs of the NAND element, the outputs of the last it is connected to the second input of the installation of additional flip-flop, and the input of the additional amplitude-time converter is connected with a second input bus indicator.